I'm familiar with Kai W's work and among some others are photography based Youtube channels and is unfair assessment of their work. Rolling shutter is not as important to a still photographer ( Perhaps along with cropped 4K video ) Seems you already made a mistake with Kai W not mentioning rolling shutter, but still want to state he doesn't mention it enough even though he's mostly into street photography/portraits/landscape. It's fair game if you want to criticize video centric channels for DSLR video reviews. This is just a friendly reminder from a fellow youtuber such as myself.